Hardware Defect Alarm

What does ALM LED ON mean?

The red ALM LED is continuously illuminated, signifying an alarm within the unit of interest or a subsequent unit. This condition strongly suggests a hardware defect within the affected unit.

• A general hardware defect alarm has been triggered by the control system's internal monitoring.
• This indicates a problem with a specific hardware component, such as a CPU board, I/O module, or power supply.
• The alarm may be due to a component exceeding its operational limits or failing unexpectedly.
• Requires diagnostic analysis to pinpoint the specific faulty hardware.

Click steps to track your progress.

1. 1

   Replace the unit where the ALM LED is continuously ON.